what are you getting if you give more than 2 hole cards?

[ericblade]

I've noticed that you can provide more than 2 cards, but it's not clear what exactly the output means in that case. My guess is that it doesn't understand any game specific rules, so it doesn't understand how to calculate things like pineapple, omaha, stud, and that it just works on an assumption that a hand could contain any number of cards, and the board will run till you have 7 cards?

So, should it be an error to have anything other than two hole cards, as otherwise that would probably mess up any other calculations?